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x:3+(123x3-54x4)=357-12

Răspuns :

x:3+(123×3-54×4)=345
123×3=369
54×4=216
369-216=153(paranteza)
x:3+153=345
x:3=345-153
x:3=192
x=192:3
x=64
Sper ca te.am ajutat!